Calflora, a 501c3 non-profit
Distribution by County   6736    
Polygonum amphibium  L.  var. stipulaceum  N. Coleman

(not an active name)
Water smartweed
Polygonum amphibium var. stipulaceum is a perennial herb that is native to California, and endemic (limited) to California.
also called Persicaria amphibia
Record Count by County

Alameda: 8 Los Angeles: 7 Placer: 4 Santa Clara: 26
Alpine: 2 Madera: 1 Plumas: 18 Santa Cruz: 26
Butte: 9 Marin: 18 Riverside: 1 Shasta: 7
Colusa: 2 Mariposa: 1 Sacramento: 6 Sierra: 6
Contra Costa: 10 Mendocino: 13 San Benito: 1 Siskiyou: 2
El Dorado: 23 Merced: 3 San Bernardino: 39 Solano: 4
Fresno: 3 Modoc: 1 San Diego: 50 Sonoma: 8
Glenn: 5 Mono: 21 San Francisco: 4 Tehama: 3
Inyo: 4 Monterey: 21 San Joaquin: 3 Tulare: 2
Kern: 2 Napa: 1 San Luis Obispo: 35 Tuolumne: 5
Lake: 12 Nevada: 8 San Mateo: 40 Ventura: 11
Lassen: 19 Orange: 10 Santa Barbara: 29 Yolo: 4

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/22/2024).